开源软件名称：

XGPullup-and-down-the-refresh

开源软件地址：

https://gitee.com/xiao66guo/XGPullup-and-down-the-refresh

开源软件介绍：

#XGPullup-and-down-the-refresh项目简介：

1️⃣用完全自定的方式来实现上拉加载更多、下拉刷新的功能；

2️⃣对上拉加载更多和下拉刷新功能已各自单独分离，可以单独使用；

3️⃣用Runtime运行时机制来监听刷新的状态；

4️⃣对细节的处理：用一个没有大小的FootView来把刷新控件的后面的分割线去掉；

5️⃣利用KVO来监听ScrollView滚动的位置来改变刷新控件的一个状态；

为ScollView添加的分类的相关代码：

////  UIScrollView+XGRefresh.m//  XGRefresh////  Created by 小果 on 16/9/28.//  Copyright © 2016年 小果. All rights reserved.//#import "UIScrollView+XGRefresh.h"#import <objc/runtime.h>static const char *upRefreshKey = "upRefreshKey";static const char *downRefreshKey = "downRefreshKey";@implementation UIScrollView (XGRefresh)-(void)setUpRefreshView:(XGPullupRefreshView *)upRefreshView{    objc_setAssociatedObject(self, upRefreshKey, upRefreshView, 1);}-(XGPullupRefreshView *)upRefreshView{    XGPullupRefreshView *upRefreshView = objc_getAssociatedObject(self, upRefreshKey);    if (nil == upRefreshView) {        upRefreshView = [[XGPullupRefreshView alloc] init];        [self addSubview:upRefreshView];        self.upRefreshView = upRefreshView;    }    return upRefreshView;}-(void)setDownRefreshView:(XGPullDownRefreshView *)downRefreshView{    objc_setAssociatedObject(self, downRefreshKey, downRefreshView, 1);}-(XGPullDownRefreshView *)downRefreshView{    XGPullDownRefreshView *downRefreshView = objc_getAssociatedObject(self, downRefreshKey);    if (nil == downRefreshView) {        downRefreshView = [[XGPullDownRefreshView alloc] init];        [self addSubview:downRefreshView];        self.downRefreshView = downRefreshView;    }    return downRefreshView;}@end